view kconfig/Makefile @ 1613:96aa7ec74936 draft

Fix yet another sed bug. The s/// command would copy the \ of substitutions before deciding what to do with them (generally overwriting the \ with the new data). When the substitution was A) at the very end of the new string, B) resolved to nothing, it could leave a trailing \ that didn't belong there and didn't get overwritten because the "copy trailing data" part that copies the original string's null terminator already happened before the \ overwrote it. The ghostwheel() function restarts regexes after embedded NUL bytes, but if the string it's passed is _longer_ than the length it's told then it gets confused (and it means we're off the end of our allocation so segfaults are likely). Fix: test for \ first and move the "copy byte" logic into an else case.
author Rob Landley <>
date Mon, 15 Dec 2014 03:34:55 -0600
parents d4176f3f3835
line wrap: on
line source

# ===========================================================================
# Kernel configuration targets
# These targets are used from top-level makefile

obj = ./kconfig
PHONY += clean help oldconfig menuconfig config silentoldconfig \
	randconfig allyesconfig allnoconfig allmodconfig defconfig

menuconfig: $(obj)/mconf $(KCONFIG_TOP)

config: $(obj)/conf $(KCONFIG_TOP)

oldconfig: $(obj)/conf $(KCONFIG_TOP)
	$< -o $(KCONFIG_TOP)

silentoldconfig: $(obj)/conf $(KCONFIG_TOP)
	$< -s $(KCONFIG_TOP)

randconfig: $(obj)/conf $(KCONFIG_TOP)
	$< -r $(KCONFIG_TOP)

allyesconfig: $(obj)/conf $(KCONFIG_TOP)
	$< -y $(KCONFIG_TOP)

allnoconfig: $(obj)/conf $(KCONFIG_TOP)
	$< -n $(KCONFIG_TOP)

defconfig: $(obj)/conf $(KCONFIG_TOP)
	$< -D /dev/null $(KCONFIG_TOP)

# Help text used by make help
	@echo  '  config	  - Update current config utilising a line-oriented program'
	@echo  '  menuconfig	  - Update current config utilising a menu based program'
	@echo  '  oldconfig	  - Update current config utilising a provided .config as base'
	@echo  '  silentoldconfig - Same as oldconfig, but quietly'
	@echo  '  randconfig	  - New config with random answer to all options'
	@echo  '  defconfig	  - New config with default answer to all options'
	@echo  '  allyesconfig	  - New config where all options are accepted with yes'
	@echo  '  allnoconfig	  - New config where all options are answered with no'

# Cheesy build

SHIPPED = kconfig/ kconfig/lex.zconf.c kconfig/zconf.hash.c

%.c: %.c_shipped
	@ln -s $(notdir $<) $@

gen_config.h: .config

kconfig/mconf: $(SHIPPED)
	$(HOSTCC) -o $@ kconfig/mconf.c kconfig/ \
		kconfig/lxdialog/*.c -lcurses -DCURSES_LOC="<ncurses.h>" \

kconfig/conf: $(SHIPPED)
	$(HOSTCC) -o $@ kconfig/conf.c kconfig/ -DKBUILD_NO_NLS=1 \

	rm -f $(wildcard kconfig/*zconf*.c) kconfig/conf kconfig/mconf